Internal-combustion motor



June 10 1930- H. A. cARTwRlGHT 1,762,214

. INTERNAL COMBUSTION MOTOR A Filed Sept. 2 4, 1927 abtozmq gmeloa: KP

Patented une 10, .p if

JUNiTEDSTATES `HORACE A. OARTWRI'GHT, OF TOLEDO, Offro-;

INTERNALLOOMBusTION moronA Application ined sepmpef 24,1927.' fseiai No. 221,637#` vThis invention relatesto features of air and gas mixing for supply to an internal Combustion motor. Y v D Thisinvention has utility when incorpo-r 5 rated in a motor OfV the lso-Calledtwo. Oyole 'by e K K v teferring to the drawings:-

Fig; lis fa section through the piston and eatures of 1 is shown with disk having crank `pin 2 from which extends connecting .rod`3 to piston having head 4 and skirt' 5 lequipped with piston rings 6. This connecting rod and orankfare shown as operating ina crank oase comprising concave section Zand companion section 8 merging into cylinder ,9 for the piston4, 5. 'This cylinder-9 is `shown yas provided with intakeports 10 and outlet port V3o 11 from compression-chamber .12'.as formed bv the seotions 7. 8. and the cylinder 9, upon Internal combustiony motor having shaft" 24Ywherefhelical lcompression spring 25 acts against? pin 2,6"through this stem 23 for normallyholding the valve 22 inclose'dl position kat theseat vl5. Plug 27 closes the chamber 24.;

This normally closed valve 22 isolatesgcorn pression chamber land Cylinder portion I18 from theby-pass orway 14.v y

In this way 14,-betweenthe valve provided bythe/throttle 2O and theVaIVe-'prOVded by thepoppet 22, isthevfuelsupplyl This fuel supply is shown as Oomprisinga plug 28 hav-- ing opening 29jtherethrough terminating inl a are seat:30 toward the way 14'andLflare'seat` 31 toward chamber 32vin head 33 mounted on` fthe `.plug V28. Thisrhead 33 has fuel supply duet -34 2in communication therewith', for supply lof. say liquid fuel, as gasolene, to .the Y chamber32. 'y Coacting between the plug 28 andange 35: of nut'36 on threaded stem -37-Of pin 38 is spring 39 tending normally to hold bevel head 40' of the pin 38 against the seatV The nut 36 has ybevel portion 41^inormally urged by the spring '39 laway from seating position as to the bevel seat 31. :g-However,y as Ythere is drop in pressure in the way 14, by lowering of pressure in'fcoinpression ohainber '12 upon the outward lstroke of the piston 4,-5,

this spring 39A may be soiadjustedas thenY to permit'unseating Of the head 40 to allow dis- Charge of `fuelffrom the1 way 29.' The unply for passing to the compression chamber and cylinder. As the piston 4, 5, reverses its travel to efect compression in the cylinder 18, the poppet valve 22 is seated. A timed ring occurs in compression chamber 16 by spark generated at spark gap 43 of spark plug 44.

This device is adaptable as a single or multiple cylinder motor, whether upright or horizontal or any desired position. The features of ignition and lubrication may be adapted to the conditions of useand whether or not a single or multiple cylinder motor. However, in the two cycle type of motor as herein disclosed, with crank case compression chamber, there is at all times flow of fresh air `as entering the port- 10 opened by the piston 4, 5, which air is not a carrier of fuel. This means, that there is in this crank case compressor, absence of fuel say of a gasolene v, type whichmight tend to thin the lubricant and. thus detract from lubrication efficiency in the bearings inthe crank case, as well as in the region of the piston skirt.

Instead of the fuel supply valve having its control spring outside the Way 14, such maybe Varied as shownin Fig. 3 to have spring 45 mounted in way 14 with seat ball 46 carriedby the spring to be held in position for normally closing duct 47 inbushingv48 sothat vfuel supply in they duct 47 may be normally kept from flowing into the way 14. As .there is draft of air from the crank case 12 toward the compression chamber 16, such draft acting upon the broad leaf spring 45, as approximating the transverse dimension of the duct 14, actsto enlarge the clearance between the free end of the spring 45 and the bushing 48, thus opening the duct 47 by moving the ball 46 clear thereof. This means that the spring 45 directs this rushing air past the portof the -d-uct 47 for vaporizing the fuel .as such fuelV passes .on past open valve 22 and into the compression chamber 16.

In this device of Fig. 1, the section'8, 9, is shown yas having water cooling chamber 49 therein, while head .50 lfor the cylinder 18, which provides the slant way 17 to the compression chamber extension section 16 also haswater chamber 51. This section 50,as a cylinder head,;has the wall 17 direct the inrushing -fuel and air as a moving strata for effective scavenging of the cylinder 18. Upon seating of the valve 22, there is, in the region Vof ,the spark plug 44, insured a fuel carrying air for effective ignition so that as combustion is propagated therefrom, there may be at all times efficient operation of the motor which is an import-ant factor for ease in starting and for .operation either with light charges .or Ain idling.

In Fig. 4, thepiston 4, 5, is shown as having directing vane '52 for creating a swirl, in the cylinder 18 .toward'the spark plug 44, in the scavenging travel ofthe intake fuel and air flowtoward the exhaust A42. In this instance,

throttle arm 21 upon throttle pin 19 carries throttle 20 in passage 14, which passage is provided with partition 53 on the side thereof away from the compression chamber 12, sothatindependent ways 54, 55, are formed. The way 54 is somewhat longer than the way 55 and accordingly provides port 56 as intake into the cylinder 18 opened by the operation of the piston 4, 5, before port 57 s opened. Since fuel supply is admitted only through the port-57, this means that fresh air, not carrying fuel, may first enter the cylinder 18, and as directed by the vane 52, effect partial scavenging of exhaust gas through the eX- haust port 42 before there is supply of air as carryinor fuel from fuel supply valve. This means that the fuel laden air as following its straight air supply does not have a tendency to blow out the exhaust, and there is resultant efficient scavenging with a retention of the fuel in the cylinder 18 for use of all of such fuel in thering operation.

In thedisclosure herein, for a two cycle motor, there is a simple construction of light weight; low cost of operation due to its efficiency with quietness and smoothness for running. The port area to the compression chamber is such that even at high speeds there may be adequate supply of fresh -air to travel by the way o f by-pass 14 to the cylinder 18.

l/Vhat is claimed and it is desired to secure by Letters Patent is:

1. A'motor comprising a piston, a cylinder on one side thereof, a compression chamber on the other side thereof, there being a way between the chamber and cylinder, a throttle in said way, an additional valve toward the cylinder from said throttle, and a fuel supply in said way between the throttle and the A additional valve, and means normally holding said additional valve closed.

2. A motor comprising a'piston, a cylinder on one side thereof, a compression'chamber on the other side thereof, there being a way between the .chamber and cylinder, a Valve maintaining said way normally closed, a fuel supply for said way, and closure means for said supply effective in closed position independently of said valve.

3. A motor comprising a piston, a cylinder on one side thereof having ports, a com-y pression chamber on theother side thereof, said piston in its travel providing port control sequence to the compression lchamber and therefrom by way of the ports of the cylinder, there being a way between the `chamber and cylinder, a fuel supply in said way, a normale ly. self-closing check valve on one side of the supply, and a throttle on the other side of said supply. t

4. A motor comprising a piston, a cylinder on one side thereof having ports', a compression lchamber on the other side thereof, said piston in its travel providing port control sequenee to the compression chamber and there' from by way of the ports of the cylinder, there being alongone side of the cylinder a Way between the chamber and cylinder parallel to the cylinder, a fuel supply in said way,anormally self-closingcheck valve on the side of the supply-toward the cylinder, there being a chamber toward the cylinder from the check valve which chamber is of less Y cross section than said cylinder, and a throttle on the side of the supply toward the chamber.

5. A Inotor comprising a piston, a cylinderV on one side thereof, a compression chamber on the other side thereof, there being a way between the chamber and cylinder, athrottle in said way, a fuel supply in said way, a first 1 check valve between the fuel supply and way,

a normally closed second check valve be# ytween the first check Valve and cylinder, and means for adjusting the throttle for thereby varying they fuel supply.

In witness whereof I aX my signature.

HORACE CARTWRIGHT. 

